I have been looking for where I can fine ProMix in my area however, there are no retailers that I was able to find. I needed to put my cracked seeds into something so I purchased from walmart Miracle grow enriched Canadian sphagnum peat moss and filled a few solo cups with it and placed my seeds. Will this be ok for now? Looking at the composition of promix on the website, it is 75% sphagnum peat. I am planning to mix this peat I have with perilite for the final mix and plan to feed the plants nutrients. Any seggestions? Is it too late to transplant seedlings to another medium?